I wouldn't get too worried about the 3.73 gears. That truck still has the same suspension and brakes as the truck with the 4.10's so only the transmission and engine will feel the difference in gears. When the 4.10 equipped truck is in 3rd gear yours might be in 2nd. It's still going to get the unit rolling fine, my old Cummins Dodge had 3.55's in it. Yeah it has a Cummins but that doesn't change the amount of force on the transmission that it took to take the truck to get rolling. My dad had the same equipped Dodge and he was towing a 12,000 lbs Aplinelite 5th wheel. Get what trailer you want within reason and monitor your transmission temp which you should be doing with any tow vehicle.

I wouldn't get too worried about the 3.73 gears. That truck still has the same suspension and brakes as the truck with the 4.10's so only the transmission and engine will feel the difference in gears. When the 4.10 equipped truck is in 3rd gear yours might be in 2nd. It's still going to get the unit rolling fine, my old Cummins Dodge had 3.55's in it. Yeah it has a Cummins but that doesn't change the amount of force on the transmission that it took to take the truck to get rolling. My dad had the same equipped Dodge and he was towing a 12,000 lbs Aplinelite 5th wheel. Get what trailer you want within reason and monitor your transmission temp which you should be doing with any tow vehicle.

Is it an expensive job to switch to 4.10 ratio? Or is there more involved? Right now the only thing I gained going from the tundra to the 2500 was 400 lbs more towing and more bed payload which is not a big deal cause I don't carry a lot of cargo in my bed.when we go camping.

Sorry, didn't mean to scare you by suggesting you would have to make a bunch of mods to your new truck. I agree with GearHd6. Just choose what you're comfortable with and have lots of family fun.

My advice is to go to your dodge dealer. A 2500 is the same as a 3500 minus a set of rear leaf springs. Talk to them and get them to do the 2500-3500 mods whatever they are. I don't think it will cost much. Then you can see what the ratings are for a 3500 configured like your truck with 3.73 rear end. If that's not enough then you may have to go to 4.11's but that would be an expensive last resort. A good dodge dealer that moves a lot a heavy trucks will understand this. You can get the truck rated to a 3500 pretty easily.

Now everyone knows the legendary power of he cummins power plant. The truck won't have the raw towing power of a diesel 3500. If your towing heavy though you will actually have more payload capability than a cummins equipped similar vehicle. That doesn't mean it will tow as powerfully the same load but you will get there just slower.

I believe you'll find that the 2500 and 3500 are equipped the same when it comes to engine, transmission and all cooling items. You'll find the difference is only in the axles, springs and brake size. I still don't think 4:10's are necessary.

I believe you'll find that the 2500 and 3500 are equipped the same when it comes to engine, transmission and all cooling items. You'll find the difference is only in the axles, springs and brake size. I still don't think 4:10's are necessary.

Agreed there is no difference between the 2500 and 3500 trucks except and extra set of leaf springs in the rear. No difference in brakes, axles, shocks. Nothing expect that little sticker on the door. That's why you go to the dealer have him put on the rear springs and verify the new payload capacity, gcvwr, gvwr etc so that you have the record.